Plot: When it comes to weddings, what’s the best way to photograph a bride? How do you get the best shots of the first dance? Capturing the special moments of the big day is a stressful job, even for professional photographers. But what about when you don't know your flash from your focus? Award-winning wedding photographer Emily Quinton shows us her tricks of the trade as she puts two amateur snappers through a crash course at one of Britain's top wedding venues